pg 199, Anatomy of a Shadowrun . Probe example.
"He decided he
had time to Probe his way into the commlink.
Two-Stroke’s commlink is device rating 2, which
gives it a Firewall of 1. Two-Stroke’s Intuition,
the other part of his defense roll, is 2."
The Defense against Probe is Firewall + WILL, not Firewall + INT.
"He rolls 4 hits
on his first attempt, compared to Two-Stroke’s
single hit. Piaffe gets User access as well as an OS
of 1 from Two-Stroke’s hit. He rolls again to get
Admin access and gets 3 hits, while Two-Stroke
gets 2 hits. That increases the OS by 3–2 for the
hits on the defense roll, and 1 more because he
is maintaining illegal access. His OS stands at 4."
Probe doesn't grant access levels! What Shadowrun is this author playing? The first test would have given the hacker 2 OS, 1 for the hit and 1 for making an illegal action. The second test would have given the hacker 3 more OS, 2 for the hits and 1 for illegal action. The hacker would be left with 5 OS and +4 dice to use on the Backdoor Entry test, which would give him Admin access.
Same page, Snoop example:
"Two-Stroke rolls no
hits, while Piaffe gets 4. Since he still has illegal
access, 1 is added to the OS, but no more additions on this test from the opposed hits, so the
OS now stands at 5."
When going in the Sleaze route, you have Admin access that doesn't count as illegal and doesn't accumulate OS. The hacker would get +1 OS from performing another illegal action though. The OS comes from the action, not the access they have.
Also, none of the hacking examples in this chapter include AR / DR comparison for Edge.